随着微信在市场上的占有率不对升高，二维码开始逐渐进入人们的视野，扫码支付，扫码关注，扫码打开连接...
究竟二维码是个什么东西我就不在这里赘述了，关于这方面大家可以去上搜索引擎
我在这里就简单介绍一下一个Java的生成二维码工具，是Google提供的，zxing
源码：
package com.king.utils;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.apache.log4j.Logger;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Hashtable;
import java.util.Random;
/**
* 创建二维码图片
* @Author：jsq
* @Date: Created in 2018/6/7 10:34
* @Modified By
**/
public class QrCodeUtil {
private static Logger logger = Logger.getLogger(QrCodeUtil.class);
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
private static final int QRCODE_SIZE = 300;
private static final int WIDTH = 60;
private static final int HEIGHT = 60;
public static void encoderJpgQrCoder(String content,String filePath) throws Exception{
File file = new File(filePath);
if(file.exists()){
SimpleDateFormat sdf = new SimpleDateFormat("yyyMMddhhmmss");
String bakName = sdf.format(new Date());
file.renameTo(new File(filePath + "."+bakName+".bak"));
}
if(!file.exists()){
file.mkdir();
}
FileOutputStream os = new FileOutputStream(file);
encoderJpgQrCoder(content,os);
}
public static void encoderJpgQrCoder(String content, HttpServletResponse response) throws Exception{
encoderJpgQrCoder(content,response.getOutputStream());
}
/**
* 生成二维码
* @param content
* @param os
* @throws Exception
*/
public static void encoderJpgQrCoder(String content, OutputStream os) throws Exception{
try {
String logoPath = getLogoPath();
boolean flag = false;
if(logoPath != null && logoPath.length() > 0 ){
flag = true;
}
logger.info("QrContent="+content);
BufferedImage bufferedImage = QrCodeUtil.createImage(content,logoPath,flag);
ImageIO.write(bufferedImage,"jpg",os);
}catch (Exception e){
e.printStackTrace();
throw e;
}
}
public static BufferedImage createImage(String content,String imgPath,boolean needCompress) throws Exception{
Hashtable<EncodeHintType,Object> hints = new Hashtable<>();
hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET,CHARSET);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE,QRCODE_SIZE,QRCODE_SIZE,hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
for(int x = 0;x < width; x++) {
for(int y = 0;y < height; y++){
image.setRGB(x,y,bitMatrix.get(x,y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
if(imgPath == null || "".equals(imgPath)){
return image;
}
insertImage(image,imgPath,needCompress);
return image;
}
private static void insertImage(BufferedImage source,String imgPath,boolean needCompress) throws Exception{
File file = new File(imgPath);
if(!file.exists()){
logger.info(" "+imgPath + " 该文件不存在!");
return ;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if(needCompress){
if(width > WIDTH){
width = WIDTH;
}
if(height > HEIGHT){
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 绘制缩小后的图
g.dispose();
src = image;
}
Graphics2D graphics2D = source.createGraphics();
int x = (QRCODE_SIZE - width) /2 ;
int y = (QRCODE_SIZE - height) /2;
graphics2D.drawImage(src,x,y,width,height,null);
Shape shape = new RoundRectangle2D.Float(x,y,width,height,6,6);
graphics2D.setStroke(new BasicStroke(3f));
graphics2D.draw(shape);
graphics2D.dispose();
}
public static String encode(String content,String imgPath,String destPath,boolean needCompress) throws Exception{
BufferedImage image = createImage(content, imgPath, needCompress);
mkdirs(destPath);
String file = new Random().nextInt(99999999) + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
return file;
}
/**
*
* @param content url内容
* @param logoImgPath 二维码logo图片地址
* @param destPath 生成的二维码位置
* @param fileName 二维码文件名
* @param needCompress 是否需要压缩
* @return
* @throws Exception
*/
public static File encodeAndGetFile(String content, String logoImgPath, String destPath, String fileName,
boolean needCompress) throws Exception {
BufferedImage image = createImage(content, logoImgPath, needCompress);
mkdirs(destPath);
if (null == fileName || fileName.length() == 0) {
fileName = new Random().nextInt(99999999) + ".jpg";
}
File file = new File(destPath + "/" + fileName);
ImageIO.write(image, FORMAT_NAME, file);
return file;
}
/**
* 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
* @param destPath 存放目录
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 生成二维码(内嵌LOGO)
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath) throws Exception {
encode(content, imgPath, destPath, false);
}
/**
* 生成二维码
* @throws Exception
*/
public static void encode(String content, String destPath, boolean needCompress) throws Exception {
encode(content, null, destPath, needCompress);
}
/**
* 生成二维码
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
encode(content, null, destPath, false);
}
/**
* 生成二维码(内嵌LOGO)
* @throws Exception
*/
public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
throws Exception {
BufferedImage image = createImage(content, imgPath, needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
/**
* 生成二维码
* @throws Exception
*/
public static void encode(String content, OutputStream output) throws Exception {
encode(content, null, output, false);
}
/**
* 解析二维码
* @throws Exception
*/
public static String decode(File file) throws Exception {
BufferedImage image;
image = ImageIO.read(file);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
System.out.println(resultStr);
return resultStr;
}
/**
* 解析二维码
* @throws Exception
*/
public static String decode(String path) throws Exception {
return decode(new File(path));
}
/**
* 获取验证码url
*
* @return
*/
public static String getLogoPath() {
String codeUrl = "";
try {
//codeUrl = PropertiesUtil.getContentByName("qrcode_logo_path");// 二维码logo地址
} catch (Exception e) {
e.printStackTrace();
}
return codeUrl;
}
public static void main(String[] args){
String url = "http://www.mobilesec110.com/";
try{
encodeAndGetFile(url,"E:\\tmp\\url.jpg","E:\\tmp","url.jpg",true);
}catch (Exception e){
e.printStackTrace();
}
}
}
生层的二维码如下图所示：
